rars

I'm not the person you asked, but I made an educational simulator for RISC-V [0]. The most critical resource even if it is not super convenient is the official RISC-V specification [1] (this is the latest draft as of writing this comment). There are a bunch of open source simulators [2] to look at for reference if you are unsure of how something is suppose to work. I would recommend compiling a C program to RISC-V and looking at disassembled machine code to get an idea for how things are normally done in terms of RISC-V assembly. There isn't any particularly nice documentation that I am aware of, but enough universities teach using it that there should be some resources that would be helpful for making a simulator. I can probably come up with some links if you are serious about making a simulator, but its a little too much effort to do fo

> Mine currently passes the basic test suites The tests in riscv-tests are not complete enough to indicate strong compliance. I have found several bugs in my implementation that were not caught by them. > but it still fails in the C runtime startup when executing programs compiled with GCC The biggest issue I have seen with running C programs is that people don't have the system calls that C runs on startup. In a log from rv8, you need brk, uname, readlinkat, and mprotect. So without those you shouldn't be able to get a program into user code unless you make a custom entry point. Source: I am the maintainer of RARS (https://github.com/TheThirdOne/rars)

I wrote an educational simulator for RISC-V [0] two and a half years ago and the documentation for RISC-V has gotten marginally better. There a fair number of universities using RISC-V to teach that have published their slides and such publicly [1]. However those is not super helpful for people who already understand assembly and computer architecture reasonably well. The best way I can see to get up to speed is to read some example demonstrating each instruction. I have thought about a site that has a table of instructions that links to an online simulator [2] to let you step through an example detailing edge cases. The best source of simple assembly examples I know of would be the tests from my project [3]. Though those could be a lot more helpful for a human reading them. As for simulators, there are quite a few. The website lists a bu